An exit poll in Britain’s election projected Thursday that Prime Minister Boris Johnson’s Conservative Party would likely win a solid majority of seats in Parliament, a decisive outcome that should allow Johnson to fulfil his plan to take the U.K. out of the European Union next month.

The survey, released just after polls closed, predicted the Conservatives would get 368 of the 650 House of Commons seats and the Labour Party 191. That would be the biggest Tory majority for several decades, and a major setback for Labour.

Based on interviews with voters leaving 144 polling stations across the country, the poll is conducted for a consortium of U.K. broadcasters and is regarded as a reliable, though not exact, indicator of the likely result. The poll also projects 55 seats for the Scottish National Party and 13 for the Liberal Democrats.

Ballots are being counted, with official results expected early Friday.

A decisive Conservative win would vindicate Johnson’s decision to press for Thursday’s early election, which was held nearly two years ahead of schedule. He said that if the Conservatives won a majority, he would get Parliament to ratify his Brexit divorce deal and take the U.K. out of the EU by the current Jan. 31 deadline.

That would fulfil the decision of British voters in 2016 to leave the EU, three and a half years after the divisive referendum result. It would start a new phase of negotiations on future relations between Britain and the 27 remaining EU members.

Johnson did not mention the exit poll as he thanked voters in a tweet. “Thank you to everyone across our great country who voted, who volunteered, who stood as candidate,” he said. “We live in the greatest democracy in the world.”

Conservative Party chairman James Cleverly said he was cautious about the poll, but that if substantiated it would give the party “a big majority” that could be used to “get Brexit done.”

The pound surged on the exit poll’s forecast, jumping over two cents against the dollar, to $1.3445, the highest in more than a year and a half. Many Investors hope a Conservative win would speed up the Brexit process and ease, at least in the short term, some of the uncertainty that has corroded business confidence since the 2016 vote.

A Labour drubbing would raise questions over the future of Labour leader Jeremy Corbyn, who will have led his left-of-centre party to two electoral defeats since 2017.

Many voters casting ballots on Thursday hoped the election might finally find a way out of the Brexit stalemate in this deeply divided nation.

On a dank, gray day with outbreaks of blustery rain, voters went to polling stations in schools, community centres, pubs and town halls after a bad-tempered five-week campaign rife with mudslinging and misinformation.

Opinion polls had given the Conservatives a steady lead, but the result was considered hard to predict, because the issue of Brexit cuts across traditional party loyalties.

Three and a half years after the U.K. voted by 52%-48% to leave the EU, Britons remain split over whether to leave the 28-nation bloc, and lawmakers have proved incapable of agreeing on departure terms.